The human nervous system can relay messages to the brain at speeds up to 200 miles per hour.

Some caterpillars have more than 4,000 distinct muscles, while humans have fewer than 800.

There are approximately 60,000 miles of blood vessels in the average human body.

Blood is thicker than water -- six times thicker.

The human stomach has approximately a one quart capacity.

One cubic inch of bone can withstand a two-ton force.

By the time you grow from infancy to adulthood, you have 144 fewer bones.

The human body contains enough iron to make a spike strong enough to hold one’s own weight.

In the coarse of a lifetime, the resting heart will have pumped enough blood to fill super tankers, each with the capacity of one million barrels.

In one day Americans smoke more than 86 million packs of cigarettes. If, as one source estimates, smokers shorten their lives by 5.5 minutes per cigarette, Americans collectively give up 18,000 years for every day they smoke.

The right lung takes in more air than the left lung.

There are 10 trillion living cells in the human body.

The human body has 45 miles of nerves.

A person breaths 7 quarts of air every minute.

Tongue prints are as unique as fingerprints.